A kind of gland is a group of cells that produce and secrete hormones, which are chemical messengers that help regulate the body's growth, metabolism, and sexual development. The five kinds of glands mentioned in the crossword solutions are the renal, ADRENAL, prostate, pineal, and LYMPH glands. The renal gland is responsible for filtering waste from the blood and producing urine. The ADRENAL gland produces hormones that help regulate the body's response to stress. The prostate gland is located in the male reproductive system and produces seminal fluid. The pineal gland is located in the brain and produces melatonin, which helps regulate sleep. The LYMPH gland is part of the immune system and helps fight infection. Finally, the endocrine gland produces hormones that help regulate metabolism, growth, and sexual development.